OSA's Digital Library

Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 3 — Feb. 10, 2014
  • pp: 2174–2184

Bilayer metallic nanofilms as broadband antireflection coatings in terahertz optical systems

Wei En Lai, Huai Wu Zhang, Yao Hua Zhu, Qi Ye Wen, Wei Wei Du, and Xiao Li Tang  »View Author Affiliations

Optics Express, Vol. 22, Issue 3, pp. 2174-2184 (2014)

View Full Text Article

Enhanced HTML    Acrobat PDF (2853 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



We present the potential of ultrathin bilayer metallic nanofilms for use as broadband antireflection coatings in the terahertz frequency range. The metallic layers are modeled using a wave-impedance matching approach. The experimental and theoretical results are in good agreement. Further, a novel method using our broadband antireflection coatings is proposed to eliminate unwanted reflections that interfere with the important reflection from the sample in terahertz reflection measurement. The proposed method significantly improves the calculation of the optical properties of liquid and biological samples.

© 2014 Optical Society of America

OCIS Codes
(160.3900) Materials : Metals
(310.1210) Thin films : Antireflection coatings
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Thin Films

Original Manuscript: August 7, 2013
Revised Manuscript: October 22, 2013
Manuscript Accepted: January 9, 2014
Published: January 27, 2014

Wei En Lai, Huai Wu Zhang, Yao Hua Zhu, Qi Ye Wen, Wei Wei Du, and Xiao Li Tang, "Bilayer metallic nanofilms as broadband antireflection coatings in terahertz optical systems," Opt. Express 22, 2174-2184 (2014)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. B. Ferguson, X. C. Zhang, “Materials for terahertz science and technology,” Nat. Mater. 1(1), 26–33 (2002). [CrossRef] [PubMed]
  2. M. C. Beard, G. M. Turner, C. A. Schmuttenmaer, “Terahertz Spectroscopy,” J. Phys. Chem. B 106(29), 7146–7159 (2002). [CrossRef]
  3. S. Huang, P. C. Ashworth, K. W. Kan, Y. Chen, V. P. Wallace, Y. T. Zhang, E. Pickwell-MacPherson, “Improved sample characterization in terahertz reflection imaging and spectroscopy,” Opt. Express 17(5), 3848–3854 (2009). [CrossRef] [PubMed]
  4. W. E. Lai, H. W. Zhang, Y. H. Zhu, Q. Y. Wen, “A Novel Method of Terahertz Spectroscopy and Imaging in Reflection Geometry,” Appl. Spectrosc. 67(1), 36–39 (2013). [CrossRef] [PubMed]
  5. K. Kawase, N. Hiromoto, “Terahertz-wave antireflection coating on Ge and GaAs with fused quartz,” Appl. Opt. 37(10), 1862–1866 (1998). [CrossRef] [PubMed]
  6. H. T. Chen, J. Zhou, J. F. O’Hara, F. Chen, A. K. Azad, A. J. Taylor, “Antireflection coating using metamaterials and identification of its mechanism,” Phys. Rev. Lett. 105(7), 073901 (2010). [CrossRef] [PubMed]
  7. Y. F. Huang, S. Chattopadhyay, Y. J. Jen, C. Y. Peng, T. A. Liu, Y. K. Hsu, C. L. Pan, H. C. Lo, C. H. Hsu, Y. H. Chang, C. S. Lee, K. H. Chen, L. C. Chen, “Improved broadband and quasi-omnidirectional anti-reflection properties with biomimetic silicon nanostructures,” Nat. Nanotechnol. 2(12), 770–774 (2007). [CrossRef] [PubMed]
  8. Y. W. Chen, P. Y. Han, X. C. Zhang, “Tunable broadband antireflection structures for silicon at terahertz frequency,” Appl. Phys. Lett. 94(4), 041106 (2009). [CrossRef]
  9. C. Brückner, T. Käsebier, B. Pradarutti, S. Riehemann, G. Notni, E. B. Kley, A. Tünnermann, “Broadband antireflective structures applied to high resistive float zone silicon in the THz spectral range,” Opt. Express 17(5), 3063–3077 (2009). [CrossRef] [PubMed]
  10. C. Brückner, B. Pradarutti, O. Stenzel, R. Steinkopf, S. Riehemann, G. Notni, A. Tünnermann, “Broadband antireflective surface-relief structure for THz optics,” Opt. Express 15(3), 779–789 (2007). [CrossRef] [PubMed]
  11. J. Kröll, J. Darmo, K. Unterrainer, “Metallic wave-impedance matching layers for broadband terahertz optical systems,” Opt. Express 15(11), 6552–6560 (2007). [CrossRef] [PubMed]
  12. A. Thoman, A. Kern, H. Helm, M. Walther, “Nanostructured gold films as broadband terahertz antireflection coatings,” Phys. Rev. B 77(19), 195405 (2008). [CrossRef]
  13. S. W. McKnight, K. P. Stewart, H. D. Drew, K. Moorjani, “Wavelength-independent anti-interference coating for the far-infrared,” Infrared Phys. Technol. 27, 327–333 (1987).
  14. M. Dressel and G. Gruener, Electrodynamics of Solids (Cambridge Press, 2002).
  15. M. Born and E. Wolf, Principles of Optics (Pergamon Press, 1980).
  16. P. U. Jepsen, U. Møller, H. Merbold, “Investigation of aqueous alcohol and sugar solutions with reflection terahertz time-domain spectroscopy,” Opt. Express 15(22), 14717–14737 (2007). [CrossRef] [PubMed]
  17. P. U. Jepsen, J. K. Jensen, U. Møller, “Characterization of aqueous alcohol solutions in bottles with THz reflection spectroscopy,” Opt. Express 16(13), 9318–9331 (2008). [CrossRef] [PubMed]
  18. Terahertz Database, http://thzdb.org .

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited